Energetic Evaluation of Residual Biomass in a Torrefaction Process
The use of biomass as a fuel presents two difficulties affecting energy efficiency: the high volume of raw materials associated with their low densities and high amounts of moisture.To solve these problems the torrefaction process appears promising.In this process a densified and dry biomass is obtained as the final product.However,the torrefaction process has been used empirically and only in solid fuels production from wood.In this paper,in order to obtain promising alternative energy biomass,five different types of residual biomass(sugarcane bagasse,banana rachis,rice husk,palm oil fiber and sawdust)in a torrefaction process in TGA were evaluated.The process was carried out at a temperature of 250 °C at low heating rates(10 °C/min)in an inert atmosphere and with a residence time of 30 min.This evaluation consisted of obtained the High Heating Value(HHV)of the biomass before and after the torrefaction process in order to find a promising solid fuel biomass.As a result,it was found that the sawdust and banana rachis have an increased HHV of 14.5%and 11%respectively.The final assessment of the biomass was performed by the energy yield index which evaluates the energy available in a solid fuel.Sawdust was found to have the best performance in the roasting process evaluated from the above perspective.The maximum energy consumption in the furnace was 1416 kJ/kg for the sugarcane bagasse torrefaction process performed at 250 K and 30 minutes of residence time.
Torrefaction energy balances residual biomass Energy HHV
David Granados Hector Iván Velásquez Farid Chejne
National University of Colombia,Medellín,Colombia
国际会议
桂林
英文
1-10
2013-07-16（万方平台首次上网日期，不代表论文的发表时间）